Dave Grohl reveals he had a baby "born outside of my marriage"

Dave Grohl has revealed that he's had a baby with someone other than his wife.

In an Instagram post, the Foo Fighters frontman writes, "I've recently become the father of a new baby daughter, born outside of my marriage."

"I plan to be a loving and supportive parent to her," Grohl continues. "I love my wife and my children, and I am doing everything I can to regain their trust and earn their forgiveness. We're grateful for your consideration toward all the children involved, as we move forward together."

A rep for Foo Fighters confirms to ABC Audio that the post is authentic.

Grohl and his wife, Jordyn Blum, have been married since 2003. They have three daughters.